Instrument



FIG. 1 is a perspective view of the instrument showing our new and ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is back view thereof;

FIG. 4 is left view thereof;

FIG. 5 is a right view thereof; and,

FIG. 6 is a top view thereof.

The broken lines in FIG. 6 illustrate unclaimed portions of the instrument and form no part of the claimed design. 

CLAIM The ornamental design for an instrument, as shown and described. 